Textile drawing mechanism



Feb. 27,' 1945..' s. R. WALSH Em 2,310,598

TEXTILE DRAWING MEGHANISM Filed April 2S, 1941 2 Sheets-Sheet l IN V ENT ORS. @af/Wzze/ ff?. Mis/.JZ

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'Feb.27,1945. s. R. WALSH Em 2,370,598

TEXTILE DRWNWMEQHANISM Y Filed April 28, 1941 2 Sheets-Shef 2 i eassATTORNEYS.

Patented Feb. 27, 1945 TEXTILE DRAWING MECHANISM Samuel Rushton Walsh,Valley Falls, and George Edward Repass, PawtucketkvR. I., assignors to H& B American Machine Company, a corporation of Maine ApplicationAprilv28, 1941, Serial No. 390,740 18 Claims. Cl. 19-13 1)This-invention relates to the drawing mechanism of drawing, twisting orspinning frames for,

operating on iibrousv textile materials, and more A particularly to adrawing mechanism of the class in which a short, endless rotatable beltor apronis used under the fibers of a moving strand of roving or sliverto support and transport the bers in their travel through a draftingzone to a forward'pair ofdrawing rolls from an intermediate pair ofdrawing rolls immediately preceding them.

It is the general object ofthe present invention to provide a drawingmechanism of the above type having an extensible belt run for 4,supporting the roving or sliver,l and improved means for varying andcontrolling the length of such belt-run as occasion requires formaintaining acontrol of the bers through the drafting zone A furtherobject ofthe invention is to pro- 'vide elevatable belt-pushing meansfor applying f adjustable pressurel to the lower belt-run and forcompressing together into varied degrees of closeness the portions ofthe upper and lower runs of the belt near to its front loop so as tolengthen or shorten the length of the active fiber-engaging portion ofthe upper belt-run by definite adjusted amounts, and in which said meanswill be movable about a pivot distal from and outside of the y zone ofaction of said belt-pushing means.

An'important feature of the invention relates to .the provision of apivoted guide device for laterally guiding the endless belt which isarranged under the' bers, and means carried by and movable with theguide device acting on the lower run of the belt to push the beltagainst a roll disposed above the` path of -travel of the bers whereby adesired and definite elongation of the length of the upper run ofthebelt may be.

obtained by adjustment of the guide device 4and diierent adjustedpositions relative` to the belt.

With these and other objects in-view, the invention consists of certainnovel features of 1 with the top rolls removed.' I

Fig. 3 is a detailedV view, on slightly enlarged scale, of the drawingdevice of the present invention; and v a spinlt Fig. 4 is a detail viewshowing the form of the side plates and pivot-shaft receiving opening'ofthe guide frame shown in Fig. 3.

Referring first to Figs. 1 and 2 of the drawings, the usual roller beamof a spinning -frameor of a Speeder is shown conventionally at I0, andit has at spaced intervals therealong-a plurality of roller stands I2,of which one is shown in the present instance, invr which is rotatablymounted the lower front roll I3, with which coacts the usual top roll.I4. Onthe roll stand is adjustably secured the bearing block I5 in whichis journaled the lower intermediate roll I6 and the lower back roll Il.A back top roll"|8 and an intermediate top roll I9 coact with the lowerback roll I'I and the lower intermediate roll I6 respectively. The threelower rolls I3, ,I6 and I1, .are all posi- .tively driven at differentspeeds by the usual the intermediate roll I6 and the front roll I3 isgreater, in order to give a large draft to the roving passing betweenthese rollsand their respective coacting top rolls. lThe top rolls I4,I8'and I9V are all preferably covered with a. resilient material, suchas leather, cork composition, natural '40 the associated belt-pushingmeans thereon into or synthetic rubber, which materials have beenemployed in.A the art; or, they canbe made of metal provided with asmooth operating surface, if desired. y

The lower front and back rolls I3 and Il are of the usual fluted orgrooved construction, while the lower intermediate roll I6 is knurled orsuitably roughened and drives the endless belt or apron 2| over whichthe roving or sliver (not shown) supplied from the back rolls Il and I8to theintermediate rolls I6 and I9 is fed from these intermediate rollsto the front rolls I3 and I4. y

As illustratedy in Figs. 1 and 3, the belt 2-I Y passes between theintermediate rolls I6 and I9, runs forward with its upper belt-run 22extending under and bent slightly upwardly around the front of thepositively driven roll 23 rotatable in the bearing block I5, has itsfront loop 24 free and yslightly in advance of the roll 23 and unguldedvwith no encirclement of any guide member internally positioned withinthis loop, and then extends downwardly over the top of an adjustablesupport-bar 25 and thence rearwardly around the roll I6. The roll 23mounted above the bers of the roving or, sliver is positively driven ina suitable manner. 'I'he fibers are supported upon the upper belt-run 22of the moving leather belt or apron 2| and controlled by theintermediate control roll 23.

The top rolls I4, I8 and I9 may be weighted and held in place by variousweighting' systems commonly employed in the art, such as, for example, asaddle and stirrup mechanism which is of .a well known construction inthe art, and which forms no particular feature of the present invention.

The support-bar 25 is carried by and extends laterally across one end ofa guide frame or cradle which is mounted at the other end upon apivot-shaft 26 and comprises side plate members 21. The pivot-shaft 26isrotatably supported in bearings 28 in the blocks I5 of a plurality ofroller stands I2, or in other words, at intervals of eight to tenspindles of the spinning frame or speeder, as the case may be.` The sideplates 21 are provided with upper recesses 29 to receive and nt aroundthe reduced portions of the lower intermediate roll I6. The support-bar25 is rigidly secured to the side members 21 of the guide frame andengages the outer surface of the lower belt-run 30 near to the freefront loop 24 and pushes the upper and lower belt-runs 22 and 30 againstthe roll 23 to produce the desired amount of lengthening or shorteningof the upper beltrun 22 relative to the arc ofl contact with the roll23, as well as the desired extension or retraction of the front loop 24with respect to the bite of the front rolls I3 and I4. l

The pivot end portions of the side plates 21 are shown provided withopenings 3| of partially circular shape which receive and have a tightpress-fit upon the correspondingly shaped mounting portion of the pivotshaft 26 whereby a swinging movement of the side plates 21 eitherupwardly or downwardly will result upon turning of the pivot-shaft inthe proper direction by `the lever 33 iixedly secured thereto to raiseor to lower the bar 25 the desired extent relative to the lower belt-run30 and thus vary the relative `spacing between the roll 23 and the bar25 and consequently the relative closeness to which the oppositebelt-runs are compressed'toward each other 'by theaction of the bar 25so that. the nose of the front loop 24 will-be positioned as desired.

Various non-circular pr polygonal shapes may be provided for the opening2| of the side plates land for the cross-sectional shape of theintertting portion of the pivot shaft whereby a nonrotary mounting ofthe plates relative to the 'pivot-shaft 26 willbe obtained.

rection as it travels forwardly from the back rolls I1 and I8 to theintermediate rolls IB and I9.

'I'he present invention is not limited to the foregoing illustrated anddescribed embodiment of a. three-roll drafting system as it is to beunderstood that it may be embodied in any of the draft stages of variousother forms of drafting systems employing four and iive pairs of rollswithout departing from the spirit of the invention. We desire it to beunderstood that we reserve the privilege of resorting to al1 themechanical changes to which the device is susceptible.

the invention being defined and limited only by the terms of theappended claims.v

We claim: v

1. In a drawing mechanism, in combination, a single endless belt orapronv to support the roving or the sliver, means acting upon the lowerrun of the belt or apron, means adapted to laterally .guide the belt orapron and arranged for movement into different adjusted positions, thesaid first-named means being carried by and raised and lowered byappropriate movement of said guide means into any of its adjustedpositions, and a roll disposed above the line of travel of the roving orthe sliver against which the belt or apron is pressed by the action ofthe said iirstnamed means in any of its adjusted positions.

v2. In a drawing mechanism, in combination, a single endless apron orbelt to support the roving or the sliver, a guide device for laterallyguiding the shank of a stud 38 carried by the roller 'stand I2 forclamping the lever 33 in the diierent adjusted positions to which thelever is manually ably secured to the pivot-shaft 23 and these iingerswhich are of substantially ,fiat shape are inclined upwardly from thepivot shaft and adapted to guide the roving or sliver in its lateraldlthe belt or apron, said guide device being movable in a directiontoward and from the sliver, means carried by saidguide'device movablebodily with the same acting on the outer side of the lower run of theapron or belt to push said belt upwardly, and means distal from saidbelt-pushing means operably connected to said guide4 device for movingit so as to adjust the position of said means in different adjustedpositions.l

3, In a drawing mechanism, in combination, a single endless apron orbelt having an upper run to support the roving or the sliver, a guideframe having spaced side members for laterally guiding the edges of thebelt or apron and to vbe movable in a direction toward and from theroving or the sliver, means carried by and movable with said frameacting upon the outer side of the lower run lof the apron or belt topush the same upwardly, and means supporting the frame at one end.arranged for adjusting said frame and said belt-pushing means to adjustsaid upper ,beltu run to a desired length, said support means comtheline of travel of the roving or sliver extending transversely of andacting upon the lower -run of the belt or apron for pushing it againstsaid roll, and spaced side members disposed at opposite side edges ofthe belt or apron to laterally u guide the same, said side members beingconnected together at one end by said bar and pivoted for swingingmovement in unison into different vertically adjusted positions so .asto vary the relative spacing between said bar and said roll and tocorrespondingly regulate 'the distance between the upper and lowerbelt-runs whereby various desired extended lengths of the upper belt-runwill be obtainable,

5. In a drawing mechanism, in combination, a

v single endless belt or apron to support the roving or the sliver, aroll disposed above the line ofl of the beltor apron for pushing itvagainst said roll, and spaced side members disposed at opposite sideYedges of the beltor apron to laterally guide the same, said side'members being conn ected together at one end by said -bar and e pivotedat their other end for swinging movement in I unison into differentvertically adjusted positions so as'to vary the relative spacing betweensaid bar and said roll and to correspondingly regulate the` distancebetween the upper. and lower belt-runs `whereby various desired extendedlengths of the upper belt-run will be obtainable. t 6. In a drawingmechanism, in combination, a' single endless belt or apron -tosupport/the roving or the sliver, a roll disposed above the line oftravel of the roving or the sliver against which the belt or apron is tobe pressed, a bar below the line of travel of the roving or sliverextending transversely of and acting upon the lower run of Athe belt orapron for pushing it against said roll, and spaced side members disposedat opposite side edges of theubelt or apron to laterally guide the same,said side members being connected to.

disposed above said member and positioned above the line of travel ofthe belt or apron, and pivotal means supporting said member and adaptedto move it into diiferent elevated positions to push said belt orapronagainst said small roll, said means comprising a guide frame havingspaced sidev members between which said belt or apron moves andswingable` relative to said beit to raise said member into variousadjusted positions to lift the belt a desired and varied extent and pushit against the small roll.

9.- In a drawing mechanism, in combination, a

positively driven roll, an endless belt on said roll having an upperbelt-,run arranged for conducting the roving o'r sliver. to the drawingrolls, a

positively driven small roll disposed above the `line of travel of theroving or ysliver and positioned in cooperating relationship with theforward portion of the upper run of said belt, a member beneath saidsmall roll acting against the outer side of the lower run of the belt tosupport the forward portion thereof, the front looptpart of said beltextending through the gap between said member and said small roll andbeing guided solely thereby, and two spaced pivoted arms forming apivoted support on which said member for engaging the lower run of thebelt is mounted.l

f seid member beingl movable beduy toward ene theA same, and meansforturning said rotatable member to move said side members and said. barinto a desired position to adjust the operating part oi' the beltor'apron't a desiredlength.

'7.In a drawing mechanism, in combination, a

.single endless belt or'apro'n to support the roving or the sliver,'aroll disposed above the line of f travel of the roving or the sliveragainst which the belt or apron is to be pressed, a bar below the lineof travel of the roving or sliver ex against said roll, and spaced side-members dis-Y posed at opposite side edges of the beit or apron tolaterally guide the same, said side members vided with. a non-circularopening, a rotatable from said small roll by appropriate pivotalmovement of said pivoted support so as to vary the'gap between saidmember and said small roll and control the relative spacing between saidforward portions of th upper and lower belt-runs whereby the eilectiveworking length of the upper belt-run is adjusted and controlled.

10. In a drawing mechanism for textile slivers or rovings,rthecombination oi positively driven bottom draft rolls of successivelygreater surface 'velocity, top rolls coactlng with said bottom rolls.

an'endless belt or apron on a positively driven bottom roll of lessvelocityy for conducting the roving or sliver to a pair of cooperatingtop and bottom draftrolls of higher velocity. a member the line oftravel of the belt or apron, and a pivoted frame having spaced armsconnected at their outer ends by said member and adapted to move itbodily into diiferent elevated positions to push said vvbelt or apronagainst said small roll,

member supporting said side members for swinging movement in unisonprovided with a non-circular portion of corresponding shape as the saidopenings in the side members'and received by s and tightly fitting thesame, an arm Vamxed to vsaid rotatable member for manually turning thesame to eiect movement of said side members and saidbar into a desiredadiusted position to obtain a desired length of the upper belt run, andmeans for securing said arm in its various adjusted positions.

8. In a drawing' mechanism. the combination of positively driven bottomdraft rolls of successively greater surface velocity, top rolls coactingwith said bottom rolls. van endless belt or apron on a positively drivenbottom roll of less velocity for conducting the roving or sliver to apair of top and bottoni rolls 'of higher velocity, a movable memberacting on the outer side of the lower run of the belt or apron, apositively-driven small roll the pivot for said neme being internem seidbeing connected together at one end by said bar, belt-pushing member andoutside of the 'zone ot the other end of said vside .members beingpro-v` lower `roll of the set forming the feed-rolls forthe other set ofdrawing rolls, said belts or aprons each having an upper part extendingbetween theassociated lower roll and its companion upper. roll andthence running forwardly toward the other set of drawing rolls forconducting the roving or sliver thereto, a roll of smaller diameter thanany of said drawing rolls positioned intermediate thereof above the lineof travel of the moving roving or sliver from said feed rolls to saidforward drawing rolls. said small roll beins of such length .as toextend laterally over' the forward part of all the upper run portions ofsaid belts or aprons, a plurality of members in tei-mediate said drawingrolls beneath said small roll each member acting on. the outerside ofthe lower run of a belt or apron to push the same and swingable invertical planes, each pair of arms being connected at their outer endportions by one of said belt-pushing members, a

single' pivot shaft upon which all of said arms i are mounted forsimultaneous swingingmovement when said shaft is actuated, and a singlecontrol element for the said pivot shaft whereby all of said arms willbe actuated in unison and cause all of said belt-pushing members tooperate,

simultaneouslyon the lower runs of the belts or aprons so as to vary thedistance apart between the said small roll and the said belt-pushingl.members and to adjust the forward part of the upper run of each of saidbelts tol a desired length.

12. The combination with a cradle for long draft spinning frames and anactuating member for the cradle having a portion of geometric shape, thecradle comprising two spaced side plates united at the front part by across-bar which serves as a guide over which slides an endless belt,each side plate having its top edge portion formed with anotch toreceive a roll for actuating the endless belt, and means in each side 'yplate' distal from said cross-bar having a geol a framefor laterallyguiding the belts or. aprons said plates andmaintains 'them separated ata distance corresponding tothe width'of the belt, said'cross-memberbeing disposed beneath the roving-engaging element that coacts with theupper belt-run and engagingtheouter Aface of the lower run of the belt,and support means for said i plates connecting' together the tail partsof the plates. said means being pivotal'ly arranged forv actuating saidplates and said cross-member to swing them into vertically adjustedpositions and maintain said cross-member and the coacting element forthe upper belt-run separated at the required distance apart-for forcingthe belt'against its coasting element withthe necessary pressure toadjust the eective operating length ofthe upper belt-run to the desiredextent.

16. V.In a textile drawing mechanismtne-combination of positively-drivenlower rolls, top rolls coactlng with said'lower rolls, an endlesstravelmetric shape corresponding to that of the said portion of theactuating member whereby rota` tion of said actuating member providesadjustment of the cradle.

13. The combination with a cradle' for long draft spinning frames and anactuating member for the cradle having a portion of geometric shape, thecradle comprising two spaced side plates rigidly connected at the frontpart by a cross-member which serves as a guide over which slides anendless belt, each side plate having its top edge portion formed with adeep notch to receive a bottom roll for actuating the endless ing belton a lower roll-for conducting the roving to a forward pair of top andlower rolls, the front loop of said belt being free and capable ofelongation when squeezed from opposite sides, a movable cross-memberengaging the outer face of the .lower run of the belt, apositively-driven small rolldisposed above said cross-member andcoacting with the upper run of the belt, and pivotal means 'for guiding`said belt, said means including said cross-member and comprising a framehaving two spaced side plates arranged for laterally guldingthe belt andswingable relative belt, and means at the rear part of each side plate yhaving a geometric shape corresponding to that of the said portion ofthe actuating member thereto to adjust said cross-member into itsvarious elevatedpositions'for positioning the crossmember and saidsmall. roll the required distance apart and forcing the belt with thenecessary pressure against the small roll to squeeze together theopposite run portions of the front loop of said belt whereby said frontloop will be elongatedand adjusted to the desired extent relative tothenip of the drawing rolls receiving the roving from said belt.

whereby rotation of said actuating member provides adjustment of thecradle.

14. In a textile drawing mechanism, the combination with an endless beltactuated b`y a positively-driven roll, and an element coacting with fthe upper run of said belt for engaging the roving \plates and thecross-member in unison to move them so as tovposition and hold thecross-member and the element coacting with the upper belt-run 6 thedesired distance, apart `for forcing the belt against the said coactingelement with the necessary pressure to adjust the effective operatinglength of the upper belt-run. 15. In a textile drawing mechanism, thecoin-v bination with a lower endless belt having. a free iront loop andactuated by a positively-driven roll within the rear loop of said belt,and an element enacting gazing the roving and conducting it to thedraw:v ing rolls, of two movable plates one at each side of the belt forlaterally guiding said belt, said plates being formed with notchportions for reoeiving lthe driving roll of the belt, a cross-memberthat rigidly connects, the forward parts of th the upper run of the beltfor en- 17. In a textile drawing mechanism'the com- Yblnation' ofpositively-driven bottom draft rolls cross-member/to be raised andlowered engagingv the outer face of the lower run of said belt, a posiofsuccessively greater surface velocity, top rolls coacting with saidbottom rolls, an endless belt having its rear loop about and inoperative relation with a. positively-driven bottom roll of lessvelocity, said belt being adapted to move in the same direction with theroving for positively feeding Vthe roving to a forward pair of top andbottom draft rolls of higher velocity, the front loop of said belt beingclose to said last-named pair of draft rolls and capable of elongationwhen squeezed from opposite sides for varying the effective operatinglength of the upper belt-run. a

tively-driven small roll disposed above said crossmember and coactingwith the upper run fof the l belt. and pivotal means incorporating saidcross- -member and adapted to laterally -guide said belt,

said means beingepivoted below the line of travel of' the roving andintermediate the'belt-drlving roll and the bottom roll-:of the draftingstage 'immediately precedingthe'draft stage in which said belt and saidcross-member operate, said means -being operative upon appropriatemovement to raise or to lower saidcrbss-member and adjust it in desiredelevated positions thereby positioning the cross-member and said smallroll the required distance apart for forcing the belt with thepnecessarypressure against said small roll to squeeze together the opposite runportions of the front loop of said belt whereby said front loop will beelongated andadiusted to the vdesired dis-- l0 front loop.

plates associated with each enlarged portion in which each cross-memberis arranged at the forward part of these plates for engaging the outerface of the lower run of an endless belt to form a support over whichslides the front loop of the belt, and means engaging said side platesat their rearward-parts for swinging said plates to vary the position ofsaid'cross-mernber which supports said front, loop of the belt, therebyto vary said SAMUEL RUsHToN WALSH. GEORGE EDWARD REPASS.

